Combined shutter and ventilator



Q t, 18, 1932. D, BASSON 1,883,753

COMBINED SHUTTER AND VENTILATOR Filed June 24. 19.3.0

IN VEN TOR.

ATTORNEY v Patented Oct. 18, 19 32 UNITED STATES PATENT OFFICE JOSEPH D. IBASSON', OF BROOKLYN, NEW YORK COMBINED SHUTTER AND VENTILATOR Application filed June 24, 1930. Serial No. 463,467.

This invention relates to projecting macular sections 11 and 12 having opposing Q chines in general and more especially to a flanges 13 and 14, illustrated in Fig. 1, which combined shutter and ventilator. are secured to one another by any suitable Among'the objects of the present invention means such as the screws 15 indicated in Fig. 3 6 it. is aimed to provide a rotor constituting 2. The opposing plane walls 16 and 17 of the 55 a combined shutter and ventilator which will sections 11 and 12 are perforated to form a intercept the light rays in the usual way durgrille, as indicated in Fig. 2. The section 11 ing the movement of the film and at the same of the casing 9, as indicated, is the one setime efiectively draw the heated air from the cured to the bracket 8 and arm 10. @310 fil The sections 16 and 17 are provided with m It is still another object of the invention central openings 18 and 19. Through the to provide an improved combination shutter opening 18 extends the stub shaft 20 of the and ventilator for intercepting the light rays rotor 21 which is secured to the shaft 5. The in the usual way and at the same time draw stub shaft 20, as indicated in Fig. 3, is split the air from the film thus to prevent the overat 22 and provided with screws 23, 23, to fricheating of the film and direct such air outtionally clamp the stub shaft onto the wardly away from the lamp so that a current shaft 5. The stub shaft 20 extends from the of air will be established outwardly from the hub 24 of the rotor 21 which is provided with space between the film and the lamp and thus two angular extensions 25 and 26. Each of prevent not only theconcentration of the heat the extensions 25 and 26 has two wing poron the film but in addition prevent the detions 27 and 28, as indicated in Fig. 3, which flection of dust particles and the like from the are preferably inclined to one another.

film onto the lamp. To the outer faces of the wing portions These and other features, capabilities and 27 and 28 of the extension 26, are secured the 25 advantages of the invention will appear from blade members 29 and 30 respectively. To 76 the subjoined detail description of one the outer faces of the wing portions 27 and specific embodiment thereof illustrated in the 28 of the extension 25 are provided the blade accompanying drawing in which members 31 and 32 respectively. To the igure 1 is an end elevation of the rotor outer face of the hub 24, facing the section 30 attached to a projecting machine; 17 of the casing 9, thereare secured the plane Fig. 2 is a section on the line 2-2 of Fig. blade members 33 and 34 respectively, see 7 1;. d particularly Fig. 2. Preferably, the blades Fig 3 is a plan of the rotor detached with 29, 30 and 33 are stamped out of one piece, as the lower blades not shown. indicated, in which case the blades 29 and 30 35 In the embodiment illustrated, there is are connected to the blade 33 by the narrow 85 shown a housing 1 of a usual projecting mastrips 35 and 36 respectively, and similarl chine through which a film 2 passes down the blades 31, 32 and 34 are stamped out of from the reel housing 3 to the reel housing 4. one piece, in which case the free outer edges The projecting machine in the housing 1 is of the blades 31 and 32 are connected to the 4.0- .equipped with a shaft 5 associated with the outer edge of the blade 34 by the narrow my 1 driving mechanism of the projecting mastrips 37 and 38 respectively.

chine. As indicated in Fig. 2, the blades 29 and 30 On the side of the lamp housing 1 in which register with the blade 33 and the blades 31 the light aperture is located, there are proand 32 register with the blade 34. The vided the arms 6 and 7. To the arm 6 a blades 33 and 34 extend in a plane perpeno5 bracket 8 is secured, the ends of which are dicular to the axis of the hub 24 and would secured to the upper portion of a. casing 9. ordinarily constitute the usual shutter of the ,The lower portion of the casing 9 is connectprojecting machine and when rotated pass ,ed by the arm 10 to the arm 7. The casing 9, the openings 39 formed in the sections 16 inthe .present instance, consists of two cirand 17. These openings 39 register with one I would direct the same toward the lamp,

I and collect on the glass bulb and the film 2, carrying with it as is not It a reflector and/ or a condenser is used the lamp would collect another and with the light aperture of the projecting machine, not shown.

The blades 29, 30, and 31, 32, register with the blades 33 and. 34 respectively, as aforesaid, and thus do not interfere with the usual action of the shutter formed by the blades 33 and 34. Due, however, to the fact that the blades 29, 30, and 31, 32,are inclined relative to the plane t theblades 33 and 34;, as indicated in Figs. 1 and 3, theywill, when rotated in the dicated in Fi 2, act as a fan to draw the air from the film 2. If the blades 33 and 34 were not disposed adjacent to'the blades 29, 30, and 31, 32, as indicated, the air so drawn from unusual from the film, not

particles of dirt and shavings shown.

it the lamp used consists of a carbon are, such air currents directed toward the luminous'portion would cause the same to'flicker. with the lamp, the dirt particles directed toward on the same and obviously aflect its eificiency. If the lamp consisted of an electric bulb, such particles of dirt and shavings would quickly accumulate affect its etficiency.

The blades 33 and 3st, in the present in stance, thus serve as a deflecting shield to cause the air and dirtparticles drawn from the film to be directed outwardly with the [resistance oiiered by siderably reduced,

- tend not only centrifugal force of the-rotor 21 and thus to draw the air from the film outwardly but also to draw the heated air from the lamp outwardly away from the film.

'-Due to thetact that'the free outer edges of the blades 29, and 31, 32, are spaced from the outer edges of the blades 33'and3 l, the

this rotor 21 is conthereby reducing the load on the driving mechanism and the efficiency in any way.

construction without of the shutter and ventilator is not affected It is obvious that various changes and modifications maybe made to the details of departing from the general spirit of the invention as set forth in the appended claims.

I claim:

1. A combined projecting machine shutter and ventilator having ahub, a plurality of inclined blades fixed on saidhub and inclined inthe Same direction to a plane exand a plurality of deflecting blades tending vertically to the axis of the hub, fixed on said hub to extend perpendicularly to the axis of the hub, in aggregate area correspondaggregate area of in registration with said inclined blades, said inclined blades drawing the air fromthe film otthe projectmg machine and said deflecting blades didirection of the arrow 10 1n-' ter and ventilator deflecting blades disposed perpendicularly to the axis of the rotor for deflecting the air so drawn outwardly away from the lamp,

said blades'being spaced from one another radially to intercept intermittently the beam of light in the usual way during the feeding interval of thefilm, the aggregate area of the inclined blades corresponding substantially to the aggregate. area of the deflecting blades, and the inclined bladesregistering with the deflecting blades, said sets of blades being spaced coaxially with relation to each other.

'3. .A combined projecting machine shuthaving a hub, a pairof spaced blades perpendicular to theaxis of said hub and mounted thereon, and a set of blades mounted on said hub and inclined in the same direction to the plane of said pair otblades, said set of inclined blades being alined with said pair of blades, and the aggregate area of 4 blades being substantially equal to the aggregate area of said inclined blades.

i. A combined projecting machine shutter and ventilator having a hub, a pair of blades spaced from 7 one perpendicular to the axis of said hub and mounted on said hub, and two pairs of inclined blades inclined in the same direction to said perpendicular blades and mounted on said hub with their outer free edges spaced from the outer free edges of said first pair ofblades, each pair of inclined blades being in alinement with. one blade of said first pair of blades, and the aggregate area of said perpendicular blades being substantially equal to-the aggregate area otsaid inclined blades and being substantiallymequal to one half of the areaof the circle described a plane perpendicular to the axis ofthe hub,

the outer free edges of each set of blades being spaced froin one another, and strips forconn'ecting the outer free edges of the blades of each set to one another.

6 A combined projectin machine shutter and ventilator having a ub,two sets of blades mounted on said hub, each set/consisting of a plane bladeand two inclined blades, the plane blade being perpendicular another extending to the axis of the hub and the inclined blades being inclined to said plane blade, the outer free edges of each set of blades being spaced from one another, and a strip connectin the outer free edge of each inclined bla e of each set to the plane blade of such set.

7. A combined projecting machine shutter and ventilator having a hub, a plurality of pairs of blades mounted on said hub and spaced from one another, each set of blades consisting of a plane blade and two inclined blades, the plane blades being perpendicular to the axis of the hub, the inclined blades being inclined to the plane blades, and strips for connecting the outer free edges of the inclined blades of each set to the plane blade of such set.

8. A combined projecting machine shutter and ventilator having a hub, a plurality of sets of blades, each set of blades being stamped out of a single sheet of metal and consisting of a plane blade and two inclined blades connected to one another, the plane blade being perpendicular to the axis of the hub and the inclined blades being inclined to said plane blade.

JOSEPH D. BASSON. 

